#include <REGX52.H>
void Delay(unsigned int time)		//@12.000MHz
{
	unsigned char i, j;

	while(time--){
		i = 2;
		j = 239;
		do
		{
			while (--j);
		} while (--i);
	}
}

void main(){
	
	unsigned char LEDNum = 0;
	
	while(1) {
		if (P3_1==0){
			Delay(20);
			while(P3_1==0);
			Delay(20);
			
			LEDNum++;
			P2=~LEDNum;
		}
	}
	
}